硬度

• Determination of water hardness with ion chromatography
  离子色谱法测定水质总硬度
• Specification for rockwell superficial hardness testers
  表面洛氏硬度计技术条件
• It has high hardness and better cutting characteristics
  硬度高，磨削性能好。
• Cavities and cores must be 280 bhn or higher
  公母模仁要在280布氏硬度或更高。
• Aluminium alloys webster hardness standard test method
  铝合金韦氏硬度试验方法
• Test methods for vickers hardness at elevated temperatures
  高温下维氏硬度试验方法
• Applications where cost is a prime concern
  。一般而言电镀都使用无硬度的铁珠
• Brinell hardness test - calibration of reference blocks
  布氏硬度试验.标准块的校准
• Glass and glass ceramics . knoop hardness test d
  玻璃和玻璃陶瓷.努氏硬度试验d
• Removing water hardness ion , such as calcium , magnesium
  去除硬度离子如钙镁等离子